题目内容：

    Last summer, bird-watchers confirmed the discovery of a new species of bird in Cambodia（柬埔寨）: the Combodian tailorbird. It was not an event of particular biological significance but it was striking for one reason: This species of tailorbird was discovered not in an unspoiled rain forest but within the limits of Combodia’s capital, Phnom Penh.

We don’t typically think of the city as a likely habitat for natural life except rats and pigeons（鸽子）, let alone as a hiding place for an undiscovered species of bird. But a new paper, published last week in the Proceedings of the Royal Society, proves it incorrect. A team of 24 researchers has studied birds and plants in 147 cities, and found that cities much more closely resemble their native habitats than they resemble each other.

It’s also true that in the world of birds and plants, as in human society, there is such thing as a world species who feels equally at home in Francisco, Milan and Beijing. Four birds appear in more than 80 percent of the cities studied, and 11 plants in more than 90 percent of the cities. On the plant side, those include meadow grass, shepherd’s purse, weeds. In the air, it’s the usual species: the pigeon, the house sparrow and the European starling（惊鸟）. They all have become completely adapted to urban life.

However, not all cities are equal protectors of plants and animals, though. City design plays an important role in greening a city. In fact, the amount of green space is a stronger predictor of the biodiversity than a city’s size.

In a world where architecture, food, language, fashion and commerce are increasingly globalized, a city’s native plants and animals are considered as a kind of city identity. Cities tend to become similar, but their natural environments stand differently apart.

1.What does the author think of the discovery of the Cambodian tailorbird?

A.It is just an exception.

B.It is a wonder for the Cambodians.

C.It is an amazing biological event.

D.It is very common in the world.

2.Weeds and sparrows are found in many cities. This seems to be a result of ________.

A.complete adaption

B.natural selection

C.good urban design

D.rapid globalization

3.We can learn that while cities tend to become similar, their natural environments ________.

A.are becoming worse

B.remain diverse

C.are expanding in size

D.stay unchanged

4.What would be the best title for the text?

A.The Discovery of New Species of Bird in Cambodia

B.The Similarity of the Habitats in Different Cities

C.City’s Native Plants and Animals—A Kind of City Identity

D.City—Protector of Native Plants and Animals